204 
with very minute purple dots. The glands between the 
pinnee are conspicuous and cupuliform. 
351. (4.) P. torquata, DC.—Province of San Luis, Dr. Gillies. 
—Jn our specimens, the leaves are all conjugato-pinnate, 
with a minute cupiliform gland : the leaflets are as small 
as in our P. dulcis, approximated and puberulous. 
852, (5.) P. astringens (Gill. mst.); arborea, ramis. robustis 
flexuosis, spinis stipularibus binis validis brevibus, foliis 
. bipinnatis sub 5-jugis, glandula inter par infimum crassa 
urceolata, pinnis sub-20-jugis, foliolis (parvis) lineari-ob- 
longis obtusis glabris basi minute ciliatis, capitulis glo- 
bosis, pedunculis simplicibus compressis 3—4-nis axillari- 
bus, legumine retiusculo compresso.— Provinces of Men- 
doza and San Juan, Dr. Gillies.—Nom. vernac. Algaro- 
billa, or Black Algaroba.—The seed-vessels are highly 
astringent, and are, at Mendoza, in common use for 
making ink: in medicine, it is applied exactly as Oak- 
Galls. | 
§ 2. Frutices. 
353. (6.) P. humilis (Gill. mst.); fruticulosa, ramis angulatis 
sulcatis valde spinosis, spinis (ramis abortivis) mollibus 
binis, foliis perpaucis in apice ramorum et inter bases 
spinarum simpliciter pinnatis unijugis, foliolis minutis 
lanceolatis acutissimis petiolo setula terminato 4-plo bre- 
vioribus, stipulis minutis subulatis, spicis pedunculatis 
solitariis medium versus ramorum ad basis latus spina- 
. rum, floribus extus glabris.— Pastures, i inthe Pampas of 
. Buenos Ayres, Dr. Gillies. 
354. (7.) P. sericantha (Gill. mst.); fruticosa aphylla (Gir), 
ramis teretibus leviter striatis spinescentibus junioribus 
pubescentibus, spicis breve pedunculatis, calyce sericeo- 
hirsuto.—Uncultivated places in the Province of San 
Luis, Dr. Gillies.—There are no traces of leaves on our 
specimens, nor did Dr. Gillies ever observe any. 
355. (8.) P. ephedrioides (Gill. mst.); fruticosa aphylla ?, ramis 
teretibus striatis spinescentibus glabris, capitulis globosis 
sessilibus.—Province of San Luis, Dr. Gillies. 
